Variable position sensor employing capacitance

Electricity: electrical systems and devices – Electrostatic capacitors – Variable

Reexamination Certificate

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Details

C361S290000, C361S292000, C361S296000

Reexamination Certificate

active

07023684

ABSTRACT:
A variable position sensor has a stationary portion and a moveable portion. A plurality of plates are positioned on one of the members with the surfaces of the plates forming segments of a larger surface. A single plate is mounted on the other of the two members. One pole of an electric potential is applied to a first of the plurality of plates on the one member and the second pole of the electric potential is applied to the single plate on the other member. Similarly a pole of an electric potential is separately applied to each of the other of the parallel plates and to the one plate. When the one plate is positioned adjacent one of the plurality of plates a capacitance is formed between the adjacent plates, and by detecting the capacitance the position of the one plate can be determined.

REFERENCES:
patent: 5150275 (1992-09-01), Lee et al.
patent: 5367429 (1994-11-01), Tsuchitani et al.
patent: 6033370 (2000-03-01), Reinbold et al.

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